Table Of Contents - Carrier 50TFQ008-012 Product Data

Easy conversion from vertical to
horizontal discharge to make retro-
fit and add-on jobs easier. To convert
from vertical to horizontal discharge,
simply interchange 2 panels. The same
basic unit can be used for a variety of
applications and can be quickly modi-
fied at the jobsite. All units are factory
shipped in the vertical discharge con-
figuration for fit-up to standard roof
curbs. The contractor can order and in-
stall the roof curbs early in the con-
struction stage, before decisions on
exact size requirements have been
made.
Prepainted galvanized steel cabi-
net with baked enamel finish is
capable of withstanding U.S.A. Test
Method Standard No. 141 (Method
6061) 500-hour salt spray test. Paint
finish is non-chalking type. All internal
cabinet panels are primed, allowing the
entire unit to have a longer life and a
more attractive appearance.
Single continuous top panel elimi-
nates any possibility of leaking at the
seams or gaskets, which tend to deteri-
orate over time and shift during rigging
procedures.
Heavy gage roll-formed base rails
with forklift and rigging holes are
integral to the unit and provide easier
maneuvering and installation. Forklift
slots are on 3 sides of the unit. Stretch-
wrap packaging protects the unit dur-
ing shipment and storage.
Exclusive tool-less removal for
the filter access panel allows the
replacement of filters without the need
for any tools.
Fifty-one mm (2-in.) return-air fil-
ters are the standard throwaway type,
easily accessed and replaced through
the filter access panel located directly
above the air intake hood.
Thru-the-bottom electrical con-
nection capability allows power and
control wiring to be routed through the
unit basepan, thereby minimizing roof
penetrations.
Color-coded electrical wiring per-
mits easy tracing and diagnostics.
Advanced hermetic compressors
mounted on vibration isolators for
additional sound integrity and structur-
al support.
Enhanced copper tube, alumi-
num plate fin coils are thoroughly
leak and pressure tested at the factory.
2
Outdoor coils have louvered, aluminum
lanced fins to provide maximum heat
transfer for optimum efficiency and
easy cleaning.
Acutrol™ refrigerant metering
system precisely controls refrigerant
flow, preventing slugging and flood-
back, while maintaining optimum unit
performance.
Corrosion-resistant sloped con-
densate pan reduces possibility of
biological growth and is in conform-
ance of ASHRAE (American Society
of Heating, Refrigeration, and Air
Conditioning Engineers) Standard 62
to meet many Indoor-Air Quality (IAQ)
specifications. The condensate drain
pan offers both bottom and end drain
capability to minimize roof penetra-
tions. The bottom drain can be used in
conjunction with the thru-the-bottom
connections. An external trap must be
field supplied.
Commercial duty motors with
permanently lubricated bearings
provide additional dependability.
Standard low ambient cooling
operation to -4 C (25 F). Optional
head pressure control kit available for
outdoor ambient conditions to -17 C
(0° F).
Factory run test printout included
with each unit, providing certifica-
tion of the unit's status at the time of
manufacture. Printout includes test
pressures, amperages, dates, and
inspectors. Every unit is thoroughly run
tested at the factory in each operating

Table of contents

Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Ratings Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4,5
Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-8
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11,12
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13-29
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36-39
mode and evacuated prior to final
charging. Every coil is then leak-tested
with helium. Automated run testing
allows accurate, undisputed tests and
measurements which are second to
none in the industry.
Ease of serviceability on all refriger-
ant access ports allow for quick and
accurate measurements to take place.
Single-side utility connections provide
easy access to perform necessary
service. Indoor motors are accessible
through a single access door to facili-
tate servicing and adjustments after
installation. Compressors are easily
accessible for troubleshooting and
system analysis.
Factory-installed Apollo commu-
nicating control (available as an
option), designed exclusively by
Carrier, actively monitors all modes of
operation as well as indoor fan status,
filter status, indoor-air quality, supply-
air temperature, and outdoor-air tem-
perature. The Apollo control board is
installed in the rooftop unit control box
and comes equipped with built-in diag-
nostic capabilities. Light-emitting
diodes (LEDs) simplify troubleshooting
by indicating thermostat commands for
both stages of heating and cooling,
indoor (evaporator) fan operation, and
economizer operation. The Apollo
communicating control is designed to
work specifically with Carrier TEMP
and VVT® thermostats.
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